Having been born in England and lived there for 22 years, I can say that yes, it's phenomenally cramped. The country is just overpopulated beyond belief.
Travelling around England is a nightmare. The traffic is horrific. It can take an hour just to travel 15 miles sometimes. It's even worse when using public transport; to catch the bus into town I had to allow an hour for travelling because there was no guarantee it would get there any sooner.
Towns and cities are crowded; you can't walk around at your own leisure because everywhere is just wall-to-wall bodies. Any public space is just heaving. Bars, restaurants, clubs, etc., are all crammed.
Everything is small; houses and roads are as tiny and narrow as possible. There becomes problems with litter and vermin because there are too many people producing too much waste and rubbish in such crammed environments. Since moving to Canada I've only been ill once, whereas all the Canadians around me catch illnesses from each other all the time, and it's probably because my immune system is so used to being surrounded by other people and their filthy retarded children.